Researchers uncover how honeybee stingers keep delivering venom after detachment

A five-year study by researchers at Macquarie University and the University of New South Wales has revealed the mechanical basis for a honeybee’s lingering sting. Using high-speed video, they captured two minute valves that act as collapsible pistons, sealing the venom chamber during the downstroke and minimizing backflow on the upstroke. This valve geometry enables continuous venom flow even after the stinger separates from the bee.

The findings were detailed in the journal PNAS and include a 3D-printed replica of the mechanism. The scientists suggest the design could be adapted for medical technologies, such as more efficient insulin pumps. The work involved delicate handling of live bees, during which the lead author was stung once.